Improved formatting. Fixed a spelling mistake
A basic plan is to make a new object keyed to the month and add each year as you go through. recducereduce() makes it pretty concise:
let dates = [{"year": 2017, "month": "Jan", "revenue": 2000}, {"year": 2017, "month": "Feb", "revenue": 3000}, {"year": 2017, "month": "Mar", "revenue": 1000}, {"year": 2016, "month": "Jan", "revenue": 5000}, {"year": 2016, "month": "Feb", "revenue": 4000}, {"year": 2016, "month": "Mar", "revenue": 2000}]
// You only want an array of values, so just return
// Object.values()
let d = Object.values(dates.reduce((a, c) =>{
// either use the existing entry or create a new one
// with month already set
(a[c.month] || (a[c.month] = {Month: c.month}))[c.year] = c.revenuerevenue;
return aa;
}, {}))
console.log(d):
A basic plan is to make a new object keyed to the month and add each year as you go through. recduce() makes it pretty concise:
let dates = [{"year": 2017, "month": "Jan", "revenue": 2000}, {"year": 2017, "month": "Feb", "revenue": 3000}, {"year": 2017, "month": "Mar", "revenue": 1000}, {"year": 2016, "month": "Jan", "revenue": 5000}, {"year": 2016, "month": "Feb", "revenue": 4000}, {"year": 2016, "month": "Mar", "revenue": 2000}]
// You only want an array of values, so just return
// Object.values()
let d = Object.values(dates.reduce((a, c) =>{
// either use the existing entry or create a new one
// with month already set
(a[c.month] || (a[c.month] = {Month: c.month}))[c.year] = c.revenue
return a
}, {}))
console.log(d):
A basic plan is to make a new object keyed to the month and add each year as you go through. reduce() makes it pretty concise:
let dates = [{"year": 2017, "month": "Jan", "revenue": 2000}, {"year": 2017, "month": "Feb", "revenue": 3000}, {"year": 2017, "month": "Mar", "revenue": 1000}, {"year": 2016, "month": "Jan", "revenue": 5000}, {"year": 2016, "month": "Feb", "revenue": 4000}, {"year": 2016, "month": "Mar", "revenue": 2000}]
// You only want an array of values, so just return Object.values()
let d = Object.values(dates.reduce((a, c) =>{
// either use the existing entry or create a new one
// with month already set
(a[c.month] || (a[c.month] = {Month: c.month}))[c.year] = c.revenue;
return a;
}, {}))
console.log(d):
A basic plan is to make a new object keyed to the month and add each year as you go through. recduce() makes it pretty concise:
let dates = [{"year": 2017, "month": "Jan", "revenue": 2000}, {"year": 2017, "month": "Feb", "revenue": 3000}, {"year": 2017, "month": "Mar", "revenue": 1000}, {"year": 2016, "month": "Jan", "revenue": 5000}, {"year": 2016, "month": "Feb", "revenue": 4000}, {"year": 2016, "month": "Mar", "revenue": 2000}]
// You only want an array of values, so just return
// Object.values()
let d = Object.values(dates.reduce((a, c) =>{
// either use the existing entry or create a new one
// with month already set
(a[c.month] || (a[c.month] = {monthMonth: c.month}))[c.year] = c.revenue
return a
}, {}))
console.log(d):
A basic plan is to make a new object keyed to the month and add each year as you go through. recduce() makes it pretty concise:
let dates = [{"year": 2017, "month": "Jan", "revenue": 2000}, {"year": 2017, "month": "Feb", "revenue": 3000}, {"year": 2017, "month": "Mar", "revenue": 1000}, {"year": 2016, "month": "Jan", "revenue": 5000}, {"year": 2016, "month": "Feb", "revenue": 4000}, {"year": 2016, "month": "Mar", "revenue": 2000}]
// You only want an array of values, so just return
// Object.values()
let d = Object.values(dates.reduce((a, c) =>{
// either use the existing entry or create a new one
// with month already set
(a[c.month] || (a[c.month] = {month: c.month}))[c.year] = c.revenue
return a
}, {}))
console.log(d):
A basic plan is to make a new object keyed to the month and add each year as you go through. recduce() makes it pretty concise:
let dates = [{"year": 2017, "month": "Jan", "revenue": 2000}, {"year": 2017, "month": "Feb", "revenue": 3000}, {"year": 2017, "month": "Mar", "revenue": 1000}, {"year": 2016, "month": "Jan", "revenue": 5000}, {"year": 2016, "month": "Feb", "revenue": 4000}, {"year": 2016, "month": "Mar", "revenue": 2000}]
// You only want an array of values, so just return
// Object.values()
let d = Object.values(dates.reduce((a, c) =>{
// either use the existing entry or create a new one
// with month already set
(a[c.month] || (a[c.month] = {Month: c.month}))[c.year] = c.revenue
return a
}, {}))
console.log(d):
A basic plan is to make a new object keyed to the month and add each year as you go through. recduce() makes it pretty concise:
let dates = [{"year": 2017, "month": "Jan", "revenue": 2000}, {"year": 2017, "month": "Feb", "revenue": 3000}, {"year": 2017, "month": "Mar", "revenue": 1000}, {"year": 2016, "month": "Jan", "revenue": 5000}, {"year": 2016, "month": "Feb", "revenue": 4000}, {"year": 2016, "month": "Mar", "revenue": 2000}]
// You only want an array of values, so just return
// Object.values()
let d = Object.values(dates.reduce((a, c) =>{
// either use the existing entry or create a new one
// with month already set
(a[c.month] || (a[c.month] = {month: c.month}))[c.year] = c.revenue
return a
}, {}))
console.log(d):
lang-js